Question

If the oxygen isotope 20O has a half-life of 15 seconds, what fraction of a sample of pure 20O remains after 1.0 minute?

Answer 1

1/16

Step-by-step explanation:

We have the half life of ²⁰O = 15 seconds

This half life means that the reactant 8s going to be half at this time

Now we have 60 seconds = 1 minute

Then in 60 seconds we are going to have 4 half life.

Then ²⁰O will be 1/2⁴

1/2⁴ = 1/16

This is the answer to this question.

Thank you!